Shared, or community, moblogs are open to all site users - provided you post on topic images (the shared blogs are moderated, and off-topic posts will be removed) more information.
Some of the shared moblogs are run as photographic challenges, often with cool new technology available to win. Full details will be in the sidebar of that moblog, and new competitions will be announced via our newsletter and the news page.
Please note that you will need to register an email address to post to some shared moblogs